- 1950[subject unknown]Independent
- 1951[subject unknown]Independent Investigators
- 1953[subject unknown]Independent Investigators
- 1951[subject unknown]Corporation Member
- 1952[subject unknown]Corporation Member
- 1953[subject unknown]Corporation Member
- 1954[subject unknown]Corporation Member
- 1955[subject unknown]Corporation Member
- 1956[subject unknown]Corporation Member
- 1957[subject unknown]Corporation Member
- 1958[subject unknown]Corporation Member
- 1959[subject unknown]Corporation Member
- 1960[subject unknown]Corporation Member
- 1961[subject unknown]Corporation Member
- 1962[subject unknown]Corporation Member
- 1963[subject unknown]Corporation Member
- 1964[subject unknown]Corporation Member
- 1965[subject unknown]Corporation Member
- 1966[subject unknown]Corporation Member
- 1967[subject unknown]Corporation Member
- 1968[subject unknown]Corporation Member
- 1969[subject unknown]Corporation Member
- 1970[subject unknown]Corporation Member
- 1971[subject unknown]Corporation Member
- 1972[subject unknown]Corporation Member
- 1973[subject unknown]Corporation Member
- 1974[subject unknown]Corporation Member